package conf import ( "encoding/json" "sort" "strings" "github.com/xtls/xray-core/app/dns" "github.com/xtls/xray-core/app/router" "github.com/xtls/xray-core/common/net" ) type NameServerConfig struct { Address *Address Port uint16 Domains []string ExpectIPs StringList } func (c *NameServerConfig) UnmarshalJSON(data []byte) error { var address Address if err := json.Unmarshal(data, &address); err == nil { c.Address = &address return nil } var advanced struct { Address *Address `json:"address"` Port uint16 `json:"port"` Domains []string `json:"domains"` ExpectIPs StringList `json:"expectIps"` } if err := json.Unmarshal(data, &advanced); err == nil { c.Address = advanced.Address c.Port = advanced.Port c.Domains = advanced.Domains c.ExpectIPs = advanced.ExpectIPs return nil } return newError("failed to parse name server: ", string(data)) } func toDomainMatchingType(t router.Domain_Type) dns.DomainMatchingType { switch t { case router.Domain_Domain: return dns.DomainMatchingType_Subdomain case router.Domain_Full: return dns.DomainMatchingType_Full case router.Domain_Plain: return dns.DomainMatchingType_Keyword case router.Domain_Regex: return dns.DomainMatchingType_Regex default: panic("unknown domain type") } } func (c *NameServerConfig) Build() (*dns.NameServer, error) { if c.Address == nil { return nil, newError("NameServer address is not specified.") } var domains []*dns.NameServer_PriorityDomain var originalRules []*dns.NameServer_OriginalRule for _, rule := range c.Domains { parsedDomain, err := parseDomainRule(rule) if err != nil { return nil, newError("invalid domain rule: ", rule).Base(err) } for _, pd := range parsedDomain { domains = append(domains, &dns.NameServer_PriorityDomain{ Type: toDomainMatchingType(pd.Type), Domain: pd.Value, }) } originalRules = append(originalRules, &dns.NameServer_OriginalRule{ Rule: rule, Size: uint32(len(parsedDomain)), }) } geoipList, err := toCidrList(c.ExpectIPs) if err != nil { return nil, newError("invalid ip rule: ", c.ExpectIPs).Base(err) } return &dns.NameServer{ Address: &net.Endpoint{ Network: net.Network_UDP, Address: c.Address.Build(), Port: uint32(c.Port), }, PrioritizedDomain: domains, Geoip: geoipList, OriginalRules: originalRules, }, nil } var typeMap = map[router.Domain_Type]dns.DomainMatchingType{ router.Domain_Full: dns.DomainMatchingType_Full, router.Domain_Domain: dns.DomainMatchingType_Subdomain, router.Domain_Plain: dns.DomainMatchingType_Keyword, router.Domain_Regex: dns.DomainMatchingType_Regex, } // DNSConfig is a JSON serializable object for dns.Config. type DNSConfig struct { Servers []*NameServerConfig `json:"servers"` Hosts map[string]*Address `json:"hosts"` ClientIP *Address `json:"clientIp"` Tag string `json:"tag"` } func getHostMapping(addr *Address) *dns.Config_HostMapping { if addr.Family().IsIP() { return &dns.Config_HostMapping{ Ip: [][]byte{[]byte(addr.IP())}, } } else { return &dns.Config_HostMapping{ ProxiedDomain: addr.Domain(), } } } // Build implements Buildable func (c *DNSConfig) Build() (*dns.Config, error) { config := &dns.Config{ Tag: c.Tag, } if c.ClientIP != nil { if !c.ClientIP.Family().IsIP() { return nil, newError("not an IP address:", c.ClientIP.String()) } config.ClientIp = []byte(c.ClientIP.IP()) } for _, server := range c.Servers { ns, err := server.Build() if err != nil { return nil, newError("failed to build name server").Base(err) } config.NameServer = append(config.NameServer, ns) } if c.Hosts != nil && len(c.Hosts) > 0 { domains := make([]string, 0, len(c.Hosts)) for domain := range c.Hosts { domains = append(domains, domain) } sort.Strings(domains) for _, domain := range domains { addr := c.Hosts[domain] var mappings []*dns.Config_HostMapping switch { case strings.HasPrefix(domain, "domain:"): mapping := getHostMapping(addr) mapping.Type = dns.DomainMatchingType_Subdomain mapping.Domain = domain[7:] mappings = append(mappings, mapping) case strings.HasPrefix(domain, "geosite:"): domains, err := loadGeositeWithAttr("geosite.dat", strings.ToUpper(domain[8:])) if err != nil { return nil, newError("invalid geosite settings: ", domain).Base(err) } for _, d := range domains { mapping := getHostMapping(addr) mapping.Type = typeMap[d.Type] mapping.Domain = d.Value mappings = append(mappings, mapping) } case strings.HasPrefix(domain, "regexp:"): mapping := getHostMapping(addr) mapping.Type = dns.DomainMatchingType_Regex mapping.Domain = domain[7:] mappings = append(mappings, mapping) case strings.HasPrefix(domain, "keyword:"): mapping := getHostMapping(addr) mapping.Type = dns.DomainMatchingType_Keyword mapping.Domain = domain[8:] mappings = append(mappings, mapping) case strings.HasPrefix(domain, "full:"): mapping := getHostMapping(addr) mapping.Type = dns.DomainMatchingType_Full mapping.Domain = domain[5:] mappings = append(mappings, mapping) case strings.HasPrefix(domain, "dotless:"): mapping := getHostMapping(addr) mapping.Type = dns.DomainMatchingType_Regex switch substr := domain[8:]; { case substr == "": mapping.Domain = "^[^.]*$" case !strings.Contains(substr, "."): mapping.Domain = "^[^.]*" + substr + "[^.]*$" default: return nil, newError("substr in dotless rule should not contain a dot: ", substr) } mappings = append(mappings, mapping) case strings.HasPrefix(domain, "ext:"): kv := strings.Split(domain[4:], ":") if len(kv) != 2 { return nil, newError("invalid external resource: ", domain) } filename := kv[0] country := kv[1] domains, err := loadGeositeWithAttr(filename, country) if err != nil { return nil, newError("failed to load domains: ", country, " from ", filename).Base(err) } for _, d := range domains { mapping := getHostMapping(addr) mapping.Type = typeMap[d.Type] mapping.Domain = d.Value mappings = append(mappings, mapping) } default: mapping := getHostMapping(addr) mapping.Type = dns.DomainMatchingType_Full mapping.Domain = domain mappings = append(mappings, mapping) } config.StaticHosts = append(config.StaticHosts, mappings...) } } return config, nil }